text: Polymers are known for featuring low refractive indices typically in the range from 1.3 to 1.8, with fluorinated polymers exhibiting refractive indices in the range from 1.3 to 1.4. 
  As such, poly(pentafluorophenyl acrylate) has been explored as a crosslinkable cladding for optical fibers when copolymerized with glycidyl methacrylate.